error[E0277]: `Unit` cannot be safely transmuted into `u8` in the defining scope of `assert::Context` --> $DIR/unit-to-u8.rs:23:52 | LL | assert::is_maybe_transmutable::<&'static Unit, &'static u8>(); | ^^^^^^^^^^^ The size of `Unit` is smaller than the size of `u8` | note: required by a bound in `is_maybe_transmutable` --> $DIR/unit-to-u8.rs:10:14 | LL | pub fn is_maybe_transmutable() | --------------------- required by a bound in this function LL | where LL | Dst: BikeshedIntrinsicFrom | |__________^ required by this bound in `is_maybe_transmutable` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.